# -*- coding: utf-8 -*-
"""
乒乓球培训管理系统 - 通知控制器（简化版）

处理系统自动通知功能，包括：
- 预约确认通知
- 课前提醒（1小时前）
- 评价提醒
- 师生关系变更通知

注意：消息系统已移除，所有通知仅记录到日志
"""

from datetime import datetime, timedelta
from typing import Optional, Dict, List, Any
from flask import current_app

from app import db
from app.models.user import User
from app.models.reservation import Reservation
from app.models.relation import StudentCoachRelation
from app.models.evaluation import Evaluation


class NotificationController:
    """通知管理控制器（简化版）"""

    @staticmethod
    def send_notification(user_id: int, title: str, content: str,
                         notification_type: str = 'system',
                         related_id: Optional[int] = None) -> bool:
        """
        发送通知消息（仅记录到日志）

        Args:
            user_id: 接收用户ID
            title: 消息标题
            content: 消息内容
            notification_type: 消息类型('system','reservation','payment','evaluation')
            related_id: 关联业务ID

        Returns:
            bool: 发送成功返回True
        """
        try:
            # 验证用户存在
            user = User.query.get(user_id)
            if not user:
                current_app.logger.warning(f"发送通知失败：用户不存在 - 用户ID: {user_id}")
                return False

            # 消息系统已移除，仅记录到日志
            current_app.logger.info(
                f"通知发送 - 用户: {user.real_name}({user_id}), "
                f"类型: {notification_type}, 标题: {title}, 内容: {content}"
            )

            return True

        except Exception as e:
            current_app.logger.error(f"发送通知失败 - 错误: {str(e)}")
            return False

    @staticmethod
    def send_reservation_confirmation(reservation_id: int) -> bool:
        """
        发送预约确认通知

        Args:
            reservation_id: 预约ID

        Returns:
            bool: 发送成功返回True
        """
        try:
            # 获取预约信息
            reservation = Reservation.query.get(reservation_id)
            if not reservation:
                return False

            # 获取相关用户信息
            student = User.query.get(reservation.student_id)
            coach = User.query.get(reservation.coach_id)

            if not student or not coach:
                return False

            # 给学员发送确认通知
            student_title = "预约确认通知"
            student_content = (
                f"您的乒乓球课程预约已确认！\n\n"
                f"教练：{coach.real_name}\n"
                f"时间：{reservation.start_time.strftime('%Y-%m-%d %H:%M')}\n"
                f"课程时长：{reservation.duration}分钟\n"
                f"状态：已确认\n\n"
                f"请按时到场，祝您训练愉快！"
            )

            # 给教练发送授课通知
            coach_title = "新的授课安排"
            coach_content = (
                f"您有新的授课安排！\n\n"
                f"学员：{student.real_name}\n"
                f"时间：{reservation.start_time.strftime('%Y-%m-%d %H:%M')}\n"
                f"课程时长：{reservation.duration}分钟\n"
                f"状态：已确认\n\n"
                f"请做好授课准备！"
            )

            # 发送通知（仅记录日志）
            NotificationController.send_notification(
                student.id, student_title, student_content, 'reservation', reservation_id
            )

            NotificationController.send_notification(
                coach.id, coach_title, coach_content, 'reservation', reservation_id
            )

            return True

        except Exception as e:
            current_app.logger.error(f"发送预约确认通知失败 - 预约ID: {reservation_id}, 错误: {str(e)}")
            return False

    @staticmethod
    def send_class_reminder(reservation_id: int) -> bool:
        """
        发送课前提醒（课程开始前1小时）

        Args:
            reservation_id: 预约ID

        Returns:
            bool: 发送成功返回True
        """
        try:
            reservation = Reservation.query.get(reservation_id)
            if not reservation:
                return False

            # 获取用户信息
            student = User.query.get(reservation.student_id)
            coach = User.query.get(reservation.coach_id)

            if not student or not coach:
                return False

            # 给学员发送课前提醒
            student_title = "课前提醒"
            student_content = (
                f"您的乒乓球课程即将开始！\n\n"
                f"教练：{coach.real_name}\n"
                f"时间：{reservation.start_time.strftime('%Y-%m-%d %H:%M')}\n"
                f"课程时长：{reservation.duration}分钟\n\n"
                f"请提前10分钟到场做准备！"
            )

            # 给教练发送授课提醒
            coach_title = "授课提醒"
            coach_content = (
                f"您的授课时间即将到来！\n\n"
                f"学员：{student.real_name}\n"
                f"时间：{reservation.start_time.strftime('%Y-%m-%d %H:%M')}\n"
                f"课程时长：{reservation.duration}分钟\n\n"
                f"请做好授课准备！"
            )

            # 发送提醒通知（仅记录日志）
            NotificationController.send_notification(
                student.id, student_title, student_content, 'system', reservation_id
            )

            NotificationController.send_notification(
                coach.id, coach_title, coach_content, 'system', reservation_id
            )

            return True

        except Exception as e:
            current_app.logger.error(f"发送课前提醒失败 - 预约ID: {reservation_id}, 错误: {str(e)}")
            return False

    @staticmethod
    def send_evaluation_reminder(reservation_id: int) -> bool:
        """
        发送课后评价提醒

        Args:
            reservation_id: 预约ID

        Returns:
            bool: 发送成功返回True
        """
        try:
            reservation = Reservation.query.get(reservation_id)
            if not reservation:
                return False

            # 检查是否已评价
            evaluation = Evaluation.query.filter_by(
                reservation_id=reservation_id
            ).first()

            if evaluation:
                return True  # 已评价，无需提醒

            # 获取用户信息
            student = User.query.get(reservation.student_id)
            coach = User.query.get(reservation.coach_id)

            if not student or not coach:
                return False

            # 给学员发送评价提醒
            student_title = "课程评价提醒"
            student_content = (
                f"您的课程已结束，欢迎对本次课程进行评价！\n\n"
                f"教练：{coach.real_name}\n"
                f"时间：{reservation.start_time.strftime('%Y-%m-%d %H:%M')}\n"
                f"课程时长：{reservation.duration}分钟\n\n"
                f"您的评价将帮助我们提供更好的服务！"
            )

            # 给教练发送评价学员提醒
            coach_title = "评价学员提醒"
            coach_content = (
                f"请对本次课程的学员表现进行评价！\n\n"
                f"学员：{student.real_name}\n"
                f"时间：{reservation.start_time.strftime('%Y-%m-%d %H:%M')}\n"
                f"课程时长：{reservation.duration}分钟\n\n"
                f"您的评价将帮助学员更好地学习和成长！"
            )

            # 发送评价提醒（仅记录日志）
            NotificationController.send_notification(
                student.id, student_title, student_content, 'evaluation', reservation_id
            )

            NotificationController.send_notification(
                coach.id, coach_title, coach_content, 'evaluation', reservation_id
            )

            return True

        except Exception as e:
            current_app.logger.error(f"发送评价提醒失败 - 预约ID: {reservation_id}, 错误: {str(e)}")
            return False

    @staticmethod
    def send_relation_notification(relation_id: int, action: str) -> bool:
        """
        发送师生关系变更通知

        Args:
            relation_id: 关系ID
            action: 操作类型 ('approved', 'rejected', 'terminated')

        Returns:
            bool: 发送成功返回True
        """
        try:
            relation = StudentCoachRelation.query.get(relation_id)
            if not relation:
                return False

            student = User.query.get(relation.student_id)
            coach = User.query.get(relation.coach_id)

            if not student or not coach:
                return False

            # 根据操作类型设置通知内容
            if action == 'approved':
                student_title = "师生关系申请通过"
                student_content = f"恭喜！您与教练 {coach.real_name} 的师生关系申请已通过，现在可以预约课程了！"

                coach_title = "新学员申请通过"
                coach_content = f"您已接受学员 {student.real_name} 的申请，现在他可以预约您的课程了！"

            elif action == 'rejected':
                student_title = "师生关系申请被拒绝"
                student_content = f"很遗憾，您与教练 {coach.real_name} 的师生关系申请被拒绝。"

                coach_title = "学员申请处理"
                coach_content = f"您已拒绝学员 {student.real_name} 的申请。"

            elif action == 'terminated':
                student_title = "师生关系已解除"
                student_content = f"您与教练 {coach.real_name} 的师生关系已解除。"

                coach_title = "师生关系已解除"
                coach_content = f"您与学员 {student.real_name} 的师生关系已解除。"
            else:
                return False

            # 发送通知（仅记录日志）
            NotificationController.send_notification(
                student.id, student_title, student_content, 'system', relation_id
            )

            NotificationController.send_notification(
                coach.id, coach_title, coach_content, 'system', relation_id
            )

            return True

        except Exception as e:
            current_app.logger.error(f"发送师生关系通知失败 - 关系ID: {relation_id}, 操作: {action}, 错误: {str(e)}")
            return False

    @staticmethod
    def get_user_messages(user_id: int, page: int = 1, per_page: int = 10,
                         message_type: Optional[str] = None) -> Dict[str, Any]:
        """
        获取用户消息列表（空实现，消息系统已移除）

        Args:
            user_id: 用户ID
            page: 页码
            per_page: 每页数量
            message_type: 消息类型

        Returns:
            Dict: 空消息列表
        """
        return {
            'messages': [],
            'total': 0,
            'pages': 0,
            'current_page': page,
            'per_page': per_page,
            'unread_count': 0
        }

    @staticmethod
    def mark_as_read(user_id: int, message_id: int) -> bool:
        """
        标记消息为已读（空实现，消息系统已移除）

        Args:
            user_id: 用户ID
            message_id: 消息ID

        Returns:
            bool: 始终返回True
        """
        current_app.logger.info(f"标记消息已读请求 - 用户ID: {user_id}, 消息ID: {message_id}（消息系统已移除）")
        return True

    @staticmethod
    def mark_all_as_read(user_id: int) -> bool:
        """
        标记用户所有消息为已读（空实现，消息系统已移除）

        Args:
            user_id: 用户ID

        Returns:
            bool: 始终返回True
        """
        current_app.logger.info(f"标记所有消息已读请求 - 用户ID: {user_id}（消息系统已移除）")
        return True

    @staticmethod
    def get_unread_count(user_id: int) -> int:
        """
        获取用户未读消息数量（空实现，消息系统已移除）

        Args:
            user_id: 用户ID

        Returns:
            int: 始终返回0
        """
        return 0

    @staticmethod
    def delete_message(user_id: int, message_id: int) -> bool:
        """
        删除消息（空实现，消息系统已移除）

        Args:
            user_id: 用户ID
            message_id: 消息ID

        Returns:
            bool: 始终返回True
        """
        current_app.logger.info(f"删除消息请求 - 用户ID: {user_id}, 消息ID: {message_id}（消息系统已移除）")
        return True